Alloy material and process of manufacturing same

ABSTRACT

The present invention discloses an alloy material and a manufacturing process of its bars. The technical solution of the present invention is: an alloy material, wherein it comprises, in mass %: Si, 0.8-1.2%; Fe,0- 0.5%; Cu, 0.15-0.6%; Mn, 0.2-0.8%; Mg, 0.6-0.1%; Cr, 0-0.1%; Zn, 0-0.25%; Ti, 0-0.1%; the balance is Al.The Si content is 1.11%. The Mn content is 0.69%. A manufacturing process of an alloy material, wherein it comprises the following steps: (1) Weighing the raw material of each component by mass percentage; (2) Placing the raw material in a melting furnace and smelt it into an alloy liquid, until the temperature of the alloy liquid reaches 705-750° C., keeping for 45-60 minutes; (3) After the alloy liquid temperature falls to 520-580° C., add refining agent, heat up to 670-710° C., and carry out composition inspection; (4). After the alloy liquid is cooled down to 650-660° C. by holding, it is poured into molds where the bars are formed by cooling. According to the solution provided by the invention, the alloy has high tensile strength and yield strength.

TECHNICAL FIELD

The present invention relates to the technical field of alloy material, in particular to an alloy material and process of manufacturing same.

BACKGROUND ART

6061-T6 is called aviation duralumin, which is light, high in strength and high in manufacturing cost. It is the abbreviation of T6 temper of 6061 aviation aluminum alloy. It has good formability, weldability and machinability; meanwhile, it has medium strength, still maintains relatively good workability after annealing. Typical applications are aviation fixtures, trucks, tower buildings, ships, pipelines and the field of other building applications that require a combination of strength, weldability and corrosion resistance. How to improve its tensile strength and yield strength to increase its application range is exactly the problem that the inventor has to solve.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the main purpose of the present invention is to provide an alloy material with high tensile strength and high yield strength.

In order to achieve the above objectives, the present invention provides the following technical solutions: an alloy material, wherein it comprises, in mass %:

Si, 0.8-1.2%;

Fe,0-0.5%;

Cu, 0.15-0.6%;

Mn, 0.2-0.8%;

Mg, 0.6-0.1%;

Cr, 0-0.1%;

Zn, 0-0.25%;

Ti, 0-0.1%; the balance is Al.

Preferably, the Si content is 1.11%.

Preferably, the Mn content is 0.69%.

A manufacturing process of an alloy material, wherein it comprises the following steps:

(1) Weighing the raw material of each component by mass percentage;

(2) Placing the raw material in a melting furnace and smelt it into an alloy liquid, until the temperature of the alloy liquid reaches 705-750° C., keeping for 45-60 minutes;

(3) After the alloy liquid temperature falls to 520-580° C., add refining agent, heat up to 670-710° C., and carry out composition inspection;

(4) After the alloy liquid is cooled down to 650-660° C. by holding, it is poured into molds where the bars are formed by cooling.

Preferably, in the step (2), the melting furnace is heated up to 705-750° C. at a rate of 260-280° C./h.

Compared with the prior art, the present invention has the following advantages: The aluminum alloy material provided by the present invention has high strength, high hardness, excellent mechanical properties, better tensile strength and yield strength, and can satisfy requirements in various applications in terms of strength, toughness, wear resistance, corrosion resistance, fatigue resistance, high temperature resistance, low temperature resistance, radiation resistance, fire resistance, explosion resistance, free cutting, free polishing, surface treatment ability, weldability, and light weight etc. In addition, the process provided by the present invention is simple and reasonable, and high in manufacturing efficiency.

SPECIFIC MODE OF EXECUTION

The present invention is further explained below:

An alloy material, wherein it comprises, in mass %:

Si, 0.8-1.2%;

Fe,0- 0.5%;

Cu, 0.15-0.6%;

Mn, 0.2-0.8%;

Mg, 0.6-0.1%;

Cr, 0-0.1%;

Zn, 0-0.25%;

Ti, 0-0.1%; the balance is Al.

Preferably, the Si content is 1.11%

Preferably, the Mn content is 0.69%.

Compared with the 6061-T6 in the prior art, the alloy material of this solution has higher Si and Mn content, and has better tensile strength and yield strength properties. For products made in different sizes, the specific comparison of parameters is shown in below table:

Mechanical properties Tensile Yield strength strength Elongation Extrusion Aging Dimensions (Mpa) (Mpa) (%) process process Standard Identical Identical A96010S-T6   28 * 12.2 Actual 1 411 389 21 21.7 * 12.2 Actual 2 408 379 19   22 * 12.2 Actual 3 407 391 17   28 * 12.2 Actual 4 389 374 20 A6061-T6 Standard 260 240 8 26.5 * 12.2 Actual 1 271 246 24 32.2 * 20   Actual 2 271 246 24   32 * 14.2 Actual 3 273 246 27   24 * 10.9 Actual 4 320 305 20

It can be seen from the above table that the alloy material provided by the present invention has a very great improvement in tensile strength and yield strength compared to 6061-T6.

A manufacturing process of an alloy material, comprising

(1) Weighing the raw material of each component by mass percentage;

(2) Placing the raw material in a melting furnace and smelt it into an alloy liquid, until the temperature of the alloy liquid reaches 705-750° C., keeping for 45-60 minutes;

(3) After the alloy liquid temperature falls to 520-580° C., add refining agent, heat up to 670-710° C., and carry out composition inspection;

(4) After the alloy liquid is cooled down to 650-660° C. by holding, it is poured into molds where the bars are formed by cooling.

Preferably, in the step (2), the melting furnace is heated up to 705-750° C. at a rate of 260-280° C./h.

The present invention has the following advantages: The aluminum alloy material provided by the present invention has high strength, high hardness, excellent mechanical properties, better tensile strength and yield strength, and can satisfy requirements in various applications in terms of strength, toughness, wear resistance, corrosion resistance, fatigue resistance, high temperature resistance, low temperature resistance, radiation resistance, fire resistance, explosion resistance, free cutting, free polishing, surface treatment ability, weldability, and light weight etc. In addition, the process provided by the present invention is simple and reasonable, and high in manufacturing efficiency.

The above is only the preferred embodiment of the present invention, and the protection scope of the invention is not limited to the above embodiment. All technical solutions under the idea of the invention are within the protection scope of the invention. It should be pointed out that improvements and refinements without departing from the principle of the invention should also be regarded as the protection scope of the invention for ordinary technicians in the technical field. 

1. An alloy material, wherein it comprises, in mass %: Si, 0.8-1.2%; Fe,0-0.5%; Cu, 0.15-0.6%; Mn, 0.2-0.8%; Mg, 0.6-0.1%; Cr, 0-0.1%; Zn, 0-0.25%; Ti, 0-0.1%; the balance is Al.
 2. The alloy material according to claim 1, wherein the Si content is 1.11%.
 3. The alloy material according to claim 1, wherein the Mn content is 0.69%.
 4. A manufacturing process of an alloy material, wherein it comprises the following steps: (1) Weighing the raw material of each component by mass percentage; (2) Placing the raw material in a melting furnace and smelt it into an alloy liquid, until the temperature of the alloy liquid reaches 705-750° C., keeping for 45-60 minutes; (3) After the alloy liquid temperature falls to 520-580° C., add refining agent, heat up to 670-710° C., and carry out composition inspection; (4) After the alloy liquid is cooled down to 650-660° C. by holding, it is poured into molds where the bars are formed by cooling.
 5. The manufacturing process of an alloy material according to claim 4, wherein: in the step (2), the melting furnace is heated up to 705-750° C. at a rate of 260-280° C./h. 